The signal suffers an attenuation loss l Received power PR= PT/L Received snr=E,/No, Eb=Pr/Rb Antennas are used to compensate for attenuation loss Capture as much of the signal as possible

McGraw-Hill Higher Education A Division of The McGraup-Hill Companies MODERN ANALYTICAL CHEMISTRY Copyright e 2000 by The McGraw-Hill Companies, Inc. All rights reserved. Printed in the United States of America. Except as permitted under the United States Copyright Act of 976, no part of this publicatio

令表示实数域R或复数域,H,及E表示上的 Hilbert空间.不同 Hilbert空间中的内积和范数统一用及 表示.我们约定内积(x,y)关于x线性、关于y共轭线性 如不特别指明数域巩或￠,所有结果同时适用于两种情形

2003年考研数学(四)真题评注 一、填空题(本题共6小题,每小题4分,满分24分.把答案填在题中横线上) (1)极限lim[+ln(1+x)x=e2

第2章线性表 一.选择题 1.a2.b3.c4.a.d6.d7.d8.c9.b10.bc11.i11.2i11.3e

Unit 10 Program Design Text 1 Computer Languages Eⅹ excises 1. Choose the best answer to complete the following sentences hat was represented by long strings zeroes A. machine language B. high-level language C. low-level language D. assembly language

Unit 2 More about Computer Text 1 Guess What It is Let's begin this unit with a riddle. Try to guess what it is? It is like a tv. but it is not It is a calculator but it is more than a calculator It is not so mysterious, but it is powerful and intelligent When you want to send or receive e-mail

一、选择题 1.d2.b3.c4.d5.d6.a71c7.2a7.37.4a7.58.b 9.c10.d11.b12.e13.d14.d1.c16.b17.c18.c19.b20.d

一、选择题:每题有3~4种选择。但只有一个选择是完全正确的,其它选择或是错误 地会使部分正确。请在完全正确的选项前划V。(每题1分) 1、e.coli DNA polymerase i具有3至5*和至3外切核酸酶活性,这两种酶活性 的区别在于: a、3至5活性只切割碱基配对处的二酯碱 b、5至3活性只切割碱基不配对处的二酯碱 c、3至5活性只切割碱基不配对处的二酯碱 d、两种活性对切割处的碱基配对与否无选择,只是5至3活性一次至切除一个核苷 酸

自学要点: 一.研究对象:大量粒子组成的体系 近独立:粒子相互作用能<粒子自身能量:E= 粒子间微弱相互作用能够使其在足够长时间内实现平衡